প্রশ্ন ও সমাধান

There is a 15% discount for a conference ticket if it is bought 5 to 29 days in advance. The discount is 30%, if the ticket is bought 30 to 59 days in advance. The discount is 40%, if the ticket is bought 60 to B9 days in advance. Sheela paid Tk 252 for the conference ticket. If she had purchased the ticket one day later, she would have paid Tk 306. How many days in advance did she purchase the ticket?FavorableUnfavorableNot SureProposal A402040Proposal B303535